Stabilized bismuthonium ylides, triphenylbismuthonio-4,4-dimethyl-2,6-dioxocyclohexane-1-ide and triphenylbismuthonio-4,4-dimethyl-2,6-dioxo-3,5-dioxan-1-ide, react with aldehydes to afford three types of products; tetraacylcyclopropanes, dihydrofurans, and α,β-unsaturated carbonyl compounds, the relative importance of these depending greatly on the ylides, aldehydes, and reaction conditions employed.
稳定的
铋鎓酰化物、
三苯基铋-4,
4-二甲基-2,6-二氧代
环己烷-1-ide 和
三苯基铋-4,
4-二甲基-2,6-二氧代-3,5-二氧杂
环己烷-1-ide 与醛反应生成三种类型的产物;四酰基
环丙烷、二氢
呋喃和 α,β-不饱和羰基化合物,其相对重要性在很大程度上取决于所使用的酰化物、醛和反应条件。